IAA RAS IAA Minor Planet Database

1866 Sisyphus (1972 XA)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5381207270 ± 5.42e-09
Semi-major axis (a)1.8933719410 AU ± 4.50e-10
Inclination (i)41.20633494° ± 7.87e-07
Long. of Asc. Node (Ω)63.44668864° ± 1.04e-06
Arg. of Perihelion (ω)293.09862767° ± 1.07e-06
Mean Anomaly (M)140.66424737° ± 8.67e-07
Mean Motion (n)0.3783191899°/day ± 1.35e-10
Perihelion dist (q)0.87450926 AU ± 1.03e-08
Aphelion dist (Q)2.91223463 AU ± 1.03e-08
Orbital Period2.60527700 yr ± 9.28e-10
Physical Parameters
H (abs. magnitude)12.48
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.220″
Uncertainty0
Orbit TypeApollo
MOID0.102869 AU
Observations Used9210
Radar Obs Used1
Gaia Obs Used79
Oppositions38
Arc Total1955-2026
First Observation Used1955-01-26
Last Observation Used2026-04-06
Observations (11960)
Date Type RA Dec Mag Band Observatory
2019-07-08 20:44:30 S 07 02 26.950 -61 48 56.63 – V C57
2019-07-08 20:44:30 s 1 +25132.830 0 +386175.58 6130.0 – C57
2019-07-08 21:14:30 S 07 02 27.230 -61 47 41.96 – V C57
2019-07-08 21:14:30 s 1 +24114.015 0 +386749.52 5150.0 – C57
2019-07-08 21:44:30 S 07 02 27.391 -61 46 28.85 – V C57
2019-07-08 21:44:30 s 1 +23094.719 0 +387315.06 5800.0 – C57
2019-07-08 22:14:30 S 07 02 27.859 -61 45 17.24 – V C57
2019-07-08 22:14:30 s 1 +22074.966 0 +387872.23 8190.0 – C57
2019-07-08 22:44:30 S 07 02 28.152 -61 44 01.28 – V C57
2019-07-08 22:44:30 s 1 +21054.780 0 +388421.04 2400.0 – C57
2019-07-08 23:14:30 S 07 02 28.310 -61 42 51.52 – V C57
2019-07-08 23:14:30 s 1 +20034.186 0 +388961.50 8560.0 – C57
2019-07-08 23:44:30 S 07 02 28.716 -61 41 35.59 – V C57
2019-07-08 23:44:30 s 1 +19013.206 0 +389493.65 6770.0 – C57
2019-07-09 00:14:30 S 07 02 29.028 -61 40 23.30 – V C57
2019-07-09 00:14:30 s 1 +17991.864 0 +390017.49 7120.0 – C57
2019-07-09 00:44:30 S 07 02 29.220 -61 39 11.09 – V C57
2019-07-09 00:44:30 s 1 +16970.184 0 +390533.04 9710.0 – C57
2019-07-09 01:14:30 S 07 02 29.597 -61 37 57.22 – V C57
2019-07-09 01:14:30 s 1 +15948.189 0 +391040.32 4660.0 – C57
2019-07-09 01:44:30 S 07 02 29.902 -61 36 44.75 – V C57
2019-07-09 01:44:30 s 1 +14925.901 0 +391539.35 2050.0 – C57
2019-07-09 02:14:30 S 07 02 30.094 -61 35 30.37 – V C57
2019-07-09 02:14:30 s 1 +13903.344 0 +392030.15 1990.0 – C57
2019-07-09 02:44:30 S 07 02 30.430 -61 34 17.83 – V C57
2019-07-09 02:44:30 s 1 +12880.540 0 +392512.72 4580.0 – C57
2019-07-09 03:14:30 S 07 02 30.758 -61 33 04.82 – V C57
2019-07-09 03:14:30 s 1 +11857.512 0 +392987.09 9920.0 – C57
2019-07-09 03:44:30 S 07 02 30.953 -61 31 52.07 – V C57
2019-07-09 03:44:30 s 1 +10834.282 0 +393453.27 8090.0 – C57
2019-07-09 04:14:30 S 07 02 31.241 -61 30 40.32 – V C57
2019-07-09 04:44:30 S 07 02 31.642 -61 29 23.96 – V C57
2019-07-09 05:14:30 S 07 02 31.814 -61 28 13.48 – V C57
2019-07-09 05:44:30 S 07 02 32.074 -61 26 59.39 – V C57
2019-07-09 06:14:30 S 07 02 32.431 -61 25 47.24 – V C57
2019-07-09 06:44:30 S 07 02 32.654 -61 24 35.21 – V C57
2019-07-09 07:14:30 S 07 02 32.875 -61 23 20.90 – V C57
2019-07-09 07:44:30 S 07 02 33.300 -61 22 09.80 – V C57
2019-07-09 08:14:30 S 07 02 33.518 -61 20 54.13 – V C57
2019-07-09 08:44:30 S 07 02 33.686 -61 19 44.62 – V C57
2019-07-09 09:44:30 S 07 02 34.339 -61 17 17.02 – V C57
2019-07-09 10:14:30 S 07 02 34.478 -61 16 06.85 – V C57
2019-07-09 10:44:30 S 07 02 34.901 -61 14 51.61 – V C57
2019-07-09 11:14:30 S 07 02 35.114 -61 13 40.58 – V C57
2019-07-09 11:44:30 S 07 02 35.287 -61 12 27.22 – V C57
2019-07-09 12:14:30 S 07 02 35.676 -61 11 14.06 – V C57
2019-07-09 12:44:30 S 07 02 35.950 -61 10 02.78 – V C57
2019-07-09 13:14:30 S 07 02 36.072 -61 08 49.16 – V C57
2019-07-09 13:44:30 S 07 02 36.406 -61 07 38.35 – V C57
2019-07-09 14:14:30 S 07 02 36.725 -61 06 22.46 – V C57
Radar Observations (2)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1985-12-08 00:00:00 -295248 20 Hz 2380 -1 -1
1985-12-08.000000 -29524800 2000 Hz 2380 251 251
Station codes
-1 Arecibo (305-m, 1963–2020)